Dec 6 – 8, 2021
University of Manchester
Europe/London timezone

Berends-Giele recursion and a 1/Nc expansion in MadGraph

Dec 7, 2021, 4:50 PM
Niels Bohr Common Room, 6th Floor Schuster Building (University of Manchester)

Niels Bohr Common Room, 6th Floor Schuster Building

University of Manchester

Department of Physics & Astronomy Oxford Road, Manchester M13 9PL


Andrew Lifson


In this talk we introduce the still-developing color_ordering branch of MadGraph5_amc@NLO. This branch uses Berends-Giele recursions to calculate the matrix element, leading to more compact kinematics calculations. Additionally, this branch allows one to calculate matrix elements to a given order in the 1/Nc colour expansion in the trace basis. In this talk, we give an overview of the status of the branch, describe the physics of the colour expansion, show the results of this approximation, and show some speed comparisons with standard MadGraph.

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